OK I need to get some honest opinions about serious dust safety protection. I have an older Trend faceshield/dust mask with the battery pack and such. It served me well over time but it has given up its life. So I want to buy one that will last me the rest of my turning years. Here is my thoughts. I could get something like the Trend which is basically a face shield as well as dust mask setup. (Airshield)Or I can get a face shield and wear a dust respirator under it. So basically 2 devices. The advantage there is I can use the respirator without the shield if just doing some finishing. This will be strictly for turning purposes. Want to turn some exotic woods as well as some phenolic resins that are extremely dusty. Both are no good to breathe. I will have dust collector going as well as shop vac for more direct catching of dust. My concerns is weight of the unit. Ease of use. If battery is involved , good battery life. Like to hear both options and hopefully from people who are currently using them. The Trend was OK but it was top heavy and the battery life went down hill quickly. But it was one of the original units so not sure if newer ones have been improved. Also what are the advantages of one over the other? Thanks.
I had some severe health issues in 2020, not because of COVID, but because of ineffective masking. At the time, we were in the heart of the pandemic, and it was impossible to get good quality masking. I started turning in Feb 2020. I tried to find good masking, but, the best I could find at the time, due to all respirators being reserved for frontline health and emergency workers, was a basic ported mask, which was effectively useless.
I developed some problems due to wood dust. It wasn't until later in the year that I discovered I'd developed a truly severe allergy to CA glue dust and fumes. It was around September 2020 that I was finally able to get my hands on a 3m half face mask, and the Pink/Mustard colored filters (which include organic/acid filtration through a chemical reaction in the filter.)
That was the first real mask I used, and while it was a dramatic improvement over the original mask I had, there were (still are, I still have and use it, but only for smaller jobs) some issues with it still. It is still a ported mask, which means that there are several membranes in place that open or close based on whether you are breathing in or out. Two membranes exist within the mask and open when you breathe in, allowing air in through the two filters on either side of the mask, and one exists outside the mask (but within a hard plastic cover with a bottom opening) that opens when you breathe out. These two sets of membranes are opposed to each other. so when you breathe out, the inlet membranes close over those ports, so you aren't exhausting air through the filter, and the outlet port closes when you breathe in so you aren't, well, breathing in everything you are trying to avoid.
These masks work well, and will protect you from most dust and toxins. However the membrane action is not instantaneous. So there is a momentary lag time, where your inward breath is "closING" the exhaust port. That moment may allow small amounts of dust or fumes in. Over time, these membranes, particularly around the edges, will pick up stuff. So you need to make sure you are cleaning the mask fairly frequently. If you keep it all clean, then it works well, and will prevent the vast majority of dust and toxins from reaching you. In my case, its not quite good enough for doing stuff that releases fumes (especially if they are released right in front of you, since the exhaust port is basically right there), and you can still get exposure. For dust, its fine for the most part. For mild fumes, I've taken to attaching a damp cloth around the exhaust port opening to help filter any backflow that might seep back into the mask from there. That said, I think you can do better.
After getting ahold of this 3M face mask...and it working, but sometimes still having problems, and after a visit to an allergist and ENT who said I had some very severe issues and allergies (including to things I'd never been exposed to or exposed to much before), I ended up buying a full sized PAPR, or Positive Air Pressure Respirator. This is similar to the Trend faceshield/dust mask, but its more robust and capable...and, the price reflects its design. I picked up the Sundstrom SR580/SR500 setup, for $1300. I don't know if it still costs the same, this was in the middle of the pandemic, so it might have been more expensive then.
The Sundstrom is a powered system. The face mask setup is a full face shield setup, with a nice wide view, and it seals around your head. This is the SR580. The SR500 is a belt with the battery pack, power system, and space for two large air filters. It comes with standard dust filters, as well as a set of prefilters (which can be relaced independently, and themselves can account for the majority of dust filtration). You can also use advanced filters (yellow band) similar to the 3M Pink/Mustard filters, that use a chemical reaction to capture and neutralize organic/acid fumes. A hose connects the belt to the mask. When powered, there is a flow of air from the bottom front of the face mask, which pressurizes the area within the face mask. Air exits around the seal (its a loose sealing elastic band that holds the seal part to your face) and out the back of the mask at the top/back of your head. This positive air pressure prevents anything from getting inside the mask at all.
This is the mask that I use for anything larger or more serious than a small part. I still use the 3M half-face mask for small things that only produce a little dust, mainly because the Sundstrom is large and a little heavy (although if you've been using the Trend, then you probably wouldn't notice!), even though IMO its vastly superior filtration and the positive pressure ensures no dust or fumes can reach your nose or lungs. The 3M is fine for very small turnings that don't produce much dust. The 3M is only moderately reliable for protecting you from things like CA fumes, though, so if you have issues with that, then a PAPR like the Sundstrom is a far superior solution. I've had good luck with battery life with the Sundstrom. I can turn for hours without the battery running out.
FWIW, before the Sundstrom, and for years even before I started wood turning, I was never able to breathe well through my nose. Since starting wood turning, my nose had become perpetually stuffed, and I had to breathe entirely through my mouth. That is quite problematic on many fronts for many reasons, not the least of which is you just get less air (even when you breathe through your mouth, you also get air through your nose, and when you can't...well, you get less air, and have lower oxygenation, which cause a slough of other problems). Since getting the Sundstrom and using it for most of my work, my nasal passages cleared up so I could breathe properly again...and the difference was huge. I also eventually started allergy shots, which are effectively a cure for common/known allergies (grass, weeds, trees, mold and regular dust, which includes to a degree some wood dust as well). I've been on the allergy shots for about three years now, and I am able to breathe through my nose like a normal person, and this is the first time in my life that I've ever felt I could breathe normally. I used to have an extremely nasal voice, that too has changed. SO....why am I talking about this? Well, its become just that much more important to me now, now that I can actually really BREATHE, not always feel like I have to suck in air just to stay alive, that I PROTECT this new state of being.
I was working on buying a proper dust filter earlier in the year, a project which I had to pause. As part of that, I was researching how best to set up a proper dust collection system, and found Bill Pentz work, designer of the Pentz cyclone, and learned just how insideous wood dust is. His work kind of put the fear of God in me about wood dust, so I've done everything I can since to make sure I'm exposed as little as possible. Aside from the fact that I seem to be prone to allergies, wood dust is a particularly insideous thing in that, the finest, and also most problematic, wood dust is the PM2.5 and smaller stuff...which is invisible to the naked eye, even if the room air is saturated with it. This is the stuff that gets deep into your lungs, where it can cause very serious problems, and where....as far as I gather, your body can't do anything about it. It gets in, and it gets stuck, and it doesn't go anywhere, hence the reason wood dust exposure is a lifetime-exposure issue. For anyone who believes the science behind wood dust and truly wants to protect themselves, a Positive Air Pressure Respirator
is the way to go to protect your lungs for a lifetime. IMHHO.